Clang complains about ambiguity between std::hash and ::hash (locally
defined). There's no need to pull in the whole namespace for two uses of
std::map anyway.
Change-Id: Icbaa7ebbaad05999988784ad34662c721fb12b29
This speeds up certain workloads considerably, particularly
those involved in buildling apps via the SDK. Windows-based
use should particularly benefit from the change.
Change-Id: I29f4b3a77400b201ee219729cc28a5e359c0c5e8